Improvement in steam-boilers



MICHAEL SMART.

Improvement in Steam Boilers. No. 123,845. Patented Feb. 20,1872.

UNITED STATES MICHAEL SMART, OF NEW YORK, N. Y.

IMPROVEMENT IN STEAM-BOILERS.

Specification forming part of Letters Patent No. 123,845, dated February 20, 1872.

Specification describing anew and Improved Steam-Boiler, invented by MICHAEL SMART, of the city, county, and State of New York.

Figure i represents a vertical longitudinal section of my improved steam-boiler. Fig. 2 is a vertical transverse section of the same.

Similar letters of reference indicate corresponding parts.

This invention relates to an improvement in steam-boilers whereby the steam is quickly separated from the water, and the danger of explosion greatly reduced, while at the same time the heat of combustion is more fully util ized than in other boilers. My invention consists principally in the application of a steamarch or vessel above the cylindrical body of the boiler, and in its connection with the latter in such manner that a smokepassage is formed between the two.

A in the drawing represents a cylindrical steam-boiler, of suitable size, provided with longitudinal horizontal fines to a, which traverse it, and supported above the fire-place B, as shown. C is a hollow arch or concavo-convex cross-section, as in Fig. 2, placed above the boiler A, and connected with it by means of pipes, in such manner that circulation of the liquids contained in both may be thoroughly efiected. A horizontal smoke-passage, b,

is formed between the boiler A and arch (J, communicating with a smoke chamber, d, formed in front of a, and with the chimney e in rear. The arch O is supported by and connected with the hollow sides D D that inclose the fire-place and communicate with the feedwater supply. The products of combustion pass from the fire-place backward under the boiler A, then forward through the flues a, into the chamber (1, and back again through the passage 1) into the chimney c. The arch (J, being above the boiler, receives the steam from the same as rapidly as created, and relieves the boiler proper, therefore, of considerable pressure. The final passage of the products of combustion under the arch O renders the latter a sort of superheater, whenever desiredthat is to say, whenever the heat is brought to the necessary height.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination of the steam-arch U with the boiler A and connecting-pipes ff, as and for the purpose specified.

MICHAEL SMART.

Witnesses:

GEO. lV. MABEE. T. B. MOSEER. 

